Fuel-feeding device for carbureters



' P- P. GILLES. FUEL FEEDING DEVICE FOR CARBURETERS.

APPLICATION FILED JULY 28. l9l9.

1,381,867, Patented June 14, 1921.

TOR

ATTOR N EY5.

UNITED STATES- PIERRE P. GILLES,

CHICAGO, ILLINOIS.

' FUEL-FEEDING DEVICE FOR CARBURETERS.

Application filed July 28,

To all whom it may concern:

Be it known that I, PIERRE P. GILLES, a citizen of the United States ofAmerica, residing at Chicago, in the county of Cook and State ofIllinois, have invented certain new and useful Improvements inFuel-Feeding Devices for Carbureteis, of which the following is aspecification.

This invention relates to fuel feeding devices for supplying fuel tocarbureters by suction from a low level fuel supply tank.

The invention has for its object to provide, in a fuel feeding devicefor carburetors, an improved valve mechanism for operatin the air andsuction valves, either or hot as desired.

More particularly, the invention is concerned with generally improvedmeans for sharply actuating a valve from a float, which gradually rises,and especially a valve which is held to its seat by suction, such as theair and suction valves of the usual fuel feeding device.

I am aware that float operated valve actuating mechanism of the generaltype a described has been provided heretofore in various forms,oneexample being shown in U. S. Letters Patent No. 1,255,306, granted to meon February 5, 1918,and this invention is concerned with improved meansfor obtaining the same general result.

Other objects and advantages will appear in the following descriptionand in the illustrative embodiment of the invention in the accompanyingdrawings, in which:

Figure 1 is a sectional elevational view of a fuel feeding deviceembodying the invention;

Fig. 2 is a fragmentary sectional plan view thereof; and

Fig. 3 is a fragmentary sectional elevational view taken generallysimilar to Fig. 2 and illustrative of a modification in detail.

Referring to these drawings in detail; A represents a suitable fuelsupply chamber, which is adapted for connection by a pipe I) with a lowlevel fuel supply tank. Chamber A is adapted to supply fuel to asuitable carbureter in any of the ways now well known in the art. In thedrawings 0 indicates conventionally the fuel outlet for chamber A. Apassage 03 connects the upper part of chamber A to the atmosphere andthis air connection may be closed by a ball valve 6. A passage 7,adapted for connection at one end to suction means, may be connected atSpecification of Letters Patent.

1919. Serial No. 313,781.

its other end to the upper part of chamber A, by the lowering of a valveg. Valve g has an upstanding extension it which is arranged to lift ball6 from its seat when valve 9 closes and to permit balls to drop backupon its seat when valve opens. The structure thus far described isgenerally well known in the art and further description of it isunnecessary to an understanding of the invention.

The valves 6 and g are adapted to alternately connect chamber A to theatmosphere and to the source of suction, respectively, and the valvesare arranged for simultaneous actuation from a float 1'. in chamber A byimproved mechanism, now to be described. Pivotally mounted at 10 is alever 11, which as shown in Fig. 2, has a bifurcated portion toencompass a depending extension 12 of the valve 91 Such extension passesthrough float i and is suitably guided, as indicated. Extension 12 isprovided with a collar 13 and studs 14 (Fig. 2) secured to thebifurcated portion of lever 11 engage between the collar 13 and thelower face of valve 9 in such a manner that a movement of the lever willmove the valve 9 and its extensions h and 12. Pivotedto the free end oflever 11, is a rod 15 which passes loosely through a bracket 16 securedto the float 2'. Fixed on rod 15 are two spaced collars 17 one above andone below the bracket 16, and a spring 18 is disposed between eachcollar 17 and the bracket 16.

As an alternative, the lever 11 may be directly connected to float i bymeans of link 19, as shown in Fig. 8, and arranged to engage a groovedcollar 20, which is slidably mounted on the extension 12. One spring 18is then placed on the latter between the collar 20 and valve g and theother spring 18 acts between collar 20 and a collar 21 fixed on theextension 12.

With the parts in the relative positions illustrated in Figs. 1 and 3,the chamber A is filled to its highest level with fuel and the suctionpassage 7 has been closed by valve 9 and the air inlet (Z opened byvalve 6. As the fuel level lowers in chamber A, float i raduallydescends. The valve g, however, 1s held to its seat by suction and doesnot immediately move away from its seat on the lowering of the float. Asthe float z descends, the lower spring 18 becomes compressed and, whencompressed suflicient'ly to overcome the force holding valve 9 to itsPatented June 14, 1921.

seat the lower sprin suddenly expands and sharply and sudden y movesvalve 9 to its lower position. Thus, the air valve 6 is closed andsuction valve 9 is opened. As the fuel level rises in chamber A, thefloat z gradually ascends but the valve 9 and its extensions h and 12are not immediately moved for the valve 6 is held to its seat by suctionand the abutment of extensions h with valve 6 prevents movement of thevalves until the upper spring 18 has been compressed sufficiently toovercome the force that holds valve 6 to its seat. At such time, valve 6is sharply and suddenly opened, thus breaking the vacuum in chamber A,and valve 9 is simultaneously closed to cut off the suction connection.

Thus an improved float operated valve actuating mechanism has beenprovided for fuel feeding devices for carbureters. It is recognized thatmodifications may be made in the structure herein described forillustrative purposes and the scope of the invention 1s, therefore, tobe defined by the appended claims rather than by the foregoingdescription.

What I claim is- 1. In a device of the class described, two valves eachadapted to be held in closed position by suction, means to actuate thevalves one from the other so that one is opened when the other is closedand the first is closed when the second is open, a float by the rise andfall of which the valves are to be operated, and means connecting thefloat to one valve; said means including a lever to increase the forceexerted by the float, a spring through which the force from the float istransmitted to the last named valve on rising movement, and. a secondspring through which the force from the float'is transmitted to the lastnamed valve on falling movement.

2. In a device of the class described, two valves, each adapted to beheld in closed posltion by suction, means to actuate the valves, onefrom the other so that one is open when the other is closed and thefirst is closed when the second is open; a float by the rise and fall ofwhich the valves are to be operated, and means connecting the float toone valve; said means including a pivotal lever connected to the floatto be swung thereby and arranged to increase the force exerted by thefloat, a spring through which the force is transmitted to the last namedvalve by said lever on its movement 1n one direction, and a secondspring through which the force is transmitted to the last named valve bysaid lever on its movement in the opposite direction.

3. In a device of the class described, two valves each adapted to beheld in closed po- SltlOII by suction, means to actuate the valves onefrom the other so that one is open when the other is closed and thefirst is closed when the second is open, a float by the rise and fall ofwhich the valves are to be onerated, a rod fixed to the last named "alvespaced abutments provided on the rod, a member slidable on the latterbetween the abutments, springs interposed between the member and theabutments, and a pivoted lever connected to be moved by the float andconnected to slide said member on said rod, whereby the gradual movementof the float in either direction compresses a spring and such springwhen sufiiciently compressed suddenly actuates the valves.

PIERRE P. GILLES.

